US5724184AExpiredUtility

Polarizer with birefringent plate

35
Priority: May 30, 1989Filed: Mar 14, 1994Granted: Mar 3, 1998
Est. expiryMay 30, 2009(expired)· nominal 20-yr term from priority
Inventors:Raymond Hesline
G02B 27/283
35
PatentIndex Score
10
Cited by
9
References
1
Claims

Abstract

A polarizing device which separates a beam (1) into polarized component beams (9) and (10) by transmitting beams through isotropic elements (2) and (4) and birefringent plate (3).

Claims

exact text as granted — not AI-modified
I claim: 
     
       1. A polarizing device comprising first and second isotropic elements of the same refractive index symmetrically arranged about a central birefringent plate, the optic axis of said plate being so arranged that ordinary and extraordinary component rays of an input ray diverge as said input ray passes from said first isotropic element into said birefringent plate whilst said ordinary and extraordinary component rays pass as parallel rays through said second isotropic element.

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